Master Chief Petty Officer John-117 is a Spartan-II supersoldier of the UNSC Navy's Special Weapons division. He served as one of the most important figures of the Human-Covenant War. After over thirty years of active duty, he is one of the most decorated war veterans of the United Nations Space Command. Among most humans, John is known simply by his rank as the "Master Chief" or (erroneously) the "Chief". This hat has the design of the Master Chief's helmet. Which kid out there doesn't dream of being their hero from a video game? Snapback for easy adjusting to accommodate youth heads.